CVE-2026-80209 Fonoster through 0.22.7 Incorrect Authorization in the Identity UpdateWorkspace Handler
Any authenticated user can rename arbitrary workspaces due to a logic error where authorization checks fail to halt execution before database updates.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-80209?
CVE-2026-80209 is a medium-severity missing authorization vulnerability in fonoster, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The updateWorkspace handler in mods/identity/src/workspaces/createUpdateWorkspace.ts in Fonoster through 0.22.7 invokes the gRPC callback with PERMISSION_DENIED when createIsWorkspaceMember reports that the caller is not a member of the target workspace, but it does not return. Execution continues into prisma.workspace.update, which is scoped by the workspace reference alone, so the rename commits before the second callback is issued and the caller receives a permission error for a write that already succeeded. The gRPC interceptor in mods/common/src/identity/createAuthInterceptor.ts binds the workspace accessKeyId to the caller's token only for paths in workspaceResourceAccess or workspaceResourceOwnerOrAdminAccess, and Identity/UpdateWorkspace is listed in fullIdentityAccess, which the base USER role holds. Any authenticated user can therefore rename an arbitrary workspace in the deployment.
Weakness: CWE-863
Which versions are affected by CVE-2026-80209?
How do I fix CVE-2026-80209?
No fix has been published for CVE-2026-80209 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-80209 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-80209 exists.
Sources
Also known as GHSA-xqrc-3jm3-hm6q.